mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-15 19:09:58 +08:00
2a940c1a22
with internal (_fpos_t and _off_t) datatypes when compiling newlib. * libc/include/sys/unistd.h: Declare _lseek using _off_t. * libc/reent/lseekr.c (_lseek_r): Use _off_t instead of off_t. * libc/stdio/fseeko.c (fseeko): Ditto. * libc/stdio/ftello.c (ftello): Ditto. * libc/stdio/stdio.c (__swrite): Ditto. (__sseek): Ditto. * libc/stdio/fgetpos.c (fgetpos): Use _fpos_t instead of fpos_t. * libc/stdio/fseek.c (fseek): Ditto. * libc/stdio/fsetpos.c (fsetpos): Ditto. * libc/stdio/ftell.c (ftell): Ditto. * libc/stdio/local.h: Declare __sseek using _off_t.
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
|
|
FUNCTION
|
|
<<fsetpos>>---restore position of a stream or file
|
|
|
|
INDEX
|
|
fsetpos
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdio.h>
|
|
int fsetpos(FILE *<[fp]>, const fpos_t *<[pos]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <stdio.h>
|
|
int fsetpos(<[fp]>, <[pos]>)
|
|
FILE *<[fp]>;
|
|
fpos_t *<[pos]>;
|
|
|
|
DESCRIPTION
|
|
Objects of type <<FILE>> can have a ``position'' that records how much
|
|
of the file your program has already read. Many of the <<stdio>> functions
|
|
depend on this position, and many change it as a side effect.
|
|
|
|
You can use <<fsetpos>> to return the file identified by <[fp]> to a previous
|
|
position <<*<[pos]>>> (after first recording it with <<fgetpos>>).
|
|
|
|
See <<fseek>> for a similar facility.
|
|
|
|
RETURNS
|
|
<<fgetpos>> returns <<0>> when successful. If <<fgetpos>> fails, the
|
|
result is <<1>>. The reason for failure is indicated in <<errno>>:
|
|
either <<ESPIPE>> (the stream identified by <[fp]> doesn't support
|
|
repositioning) or <<EINVAL>> (invalid file position).
|
|
|
|
PORTABILITY
|
|
ANSI C requires <<fsetpos>>, but does not specify the nature of
|
|
<<*<[pos]>>> beyond identifying it as written by <<fgetpos>>.
|
|
|
|
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
|
|
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
int
|
|
_DEFUN (fsetpos, (iop, pos),
|
|
FILE * iop _AND
|
|
_CONST _fpos_t * pos)
|
|
{
|
|
int x = fseek (iop, *pos, SEEK_SET);
|
|
|
|
if (x != 0)
|
|
return 1;
|
|
return 0;
|
|
}
|